He bought the card for just under $1,800 -- but experts tell us the card could sell now in the neighborhood of $25,000 ... maybe more!
The owner took the card to Goldin Auctions with the caveat that half of the winning proceeds would go toward Colin's "Know Your Rights Camp."
In case you're wondering, Colin's KYRC says it's mission is to "advance the liberation and well-being of Black and Brown communities through education, self-empowerment, mass-mobilization and the creation of new systems that elevate the next generation of change leaders."
We're told the Camp is thrilled about the auction and appreciates the forthcoming donation.
The auction -- which already has a $1,000 bid -- closes later this month.